Zobrazeno 1 - 10
of 126
pro vyhledávání: '"Keresztes, Zoltán"'
Publikováno v:
Phys. Rev. D 103, 124056 (2021)
We apply a recently developed 2+1+1 decomposition of spacetime, based on a nonorthogonal double foliation for the study of spherically symmetric, static black hole solutions of Horndeski scalar-tensor theory. Our discussion proceeds in an effective f
Externí odkaz:
http://arxiv.org/abs/2210.00287
Publikováno v:
Phys. Rev. D 103, 084025 (2021)
Based on the secular spin evolution of black holes, neutron stars, gravastars, or boson stars in precessing compact binaries on eccentric orbit, we identify the aligned and more generic coplanar configurations of the spins and orbital angular momentu
Externí odkaz:
http://arxiv.org/abs/2210.00285
Publikováno v:
Phys. Rev. D 103, 084024 (2021)
We discuss precessing compact binaries on eccentric orbit with gravastar, black hole, neutron star, or boson star components. We derive secular evolution equations to second post-Newtonian--order accuracy, with leading-order spin-orbit, spin-spin, an
Externí odkaz:
http://arxiv.org/abs/2210.00284
Publikováno v:
Universe 2018, 4(1), 9
The 2+1+1 decomposition of space-time is useful in monitoring the temporal evolution of gravitational perturbations/waves in space-times with a spatial direction singled-out by symmetries. Such an approach based on a perpendicular double foliation ha
Externí odkaz:
http://arxiv.org/abs/2007.00983
Publikováno v:
Phys. Rev. D 102, 024044 (2020)
We revisit the issue of the fluid description of minimally coupled scalar fields. While in a cosmological setup the interpretation of a time-evolving scalar field as a perfect fluid is well-understood, the situation is more intricate when the scalar
Externí odkaz:
http://arxiv.org/abs/2007.01326
Autor:
Mikóczi, Balázs, Keresztes, Zoltán
Publikováno v:
Ann. Phys. (Berlin) 2022, 2100444
The dynamics of spinning test bodies, moving in rotating black hole (Kerr, Bardeen-like and Hayward-like) spacetimes, are investigated. In Kerr spacetime, all the spherical, zoom-whirl and unbound orbits are considered numerically. Along spherical or
Externí odkaz:
http://arxiv.org/abs/1907.00974
Publikováno v:
Symmetry 2018, 10, 520
We confront a non-relativistic Bose--Einstein Condensate (BEC) model of light bosons interacting gravitationally either through a Newtonian or a Yukawa potential with the observed rotational curves of $12$ dwarf galaxies. The baryonic component is mo
Externí odkaz:
http://arxiv.org/abs/1905.04336
Publikováno v:
Phys. Rev. D 99, 104071 (2019)
Motivated by situations with temporal evolution and spatial symmetries both singled out, we develop a new 2+1+1 decomposition of spacetime, based on a nonorthogonal double foliation. Time evolution proceeds along the leaves of the spatial foliation.
Externí odkaz:
http://arxiv.org/abs/1905.00039
Publikováno v:
Universe 2017, 3(4), 69
In this work we consider perturbations of homogeneous and hypersurface orthogonal cosmological backgrounds with local rotational symmetry (LRS), using a method based on the 1 + 1 + 2 covariant split of spacetime. The backgrounds, of LRS class II, are
Externí odkaz:
http://arxiv.org/abs/1801.01147
We derive the conservative secular evolution of precessing compact binaries to second post-Newtonian order accuracy, with leading-order spin-orbit, spin-spin and mass quadrupole-monopole contributions included. The emerging closed system of first-ord
Externí odkaz:
http://arxiv.org/abs/1609.05915